The clinical effect of Botulinum Toxin (Btx) A has been established in three randomized controlled trials (RCT) in axillary hyperhidrosis. One RCT has indicated a positive effect in palmar hyperhidrosis. Although there is increasing evidence that Btx A and B have a similar effect on hyperhidrosis of other parts of the body (ie hyperhidrosis of the face, trunk, groin and feet) which is reported in case-reports and open studies there is still a great need for more controlled studies. This is why we will carry out this randomized, double-blind, placebo-controlled study to investigate the clinical effect and safety of Btx A in palmar, plantar and inguinal (groins/buttocks) hyperhidrosis and the clinical effect and safety of Btx B in craniofacial and truncal hyperhidrosis, respectively. Besides using the DLQI instrument we will also study Btx A/B to elucidate the impact of this treatment on quality of life using a generic instrument, the effect on anxiety and depressive symptoms, sweating, and patients´global assessment of therapy.